270 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



n6t distinct, often obsolete, and the basal and median spots usually 

 connected to each other and forming a more or less distinct vitta on 

 basal half, whereas in impeocus the pubescent spots are distinct, and 

 the basal and median ones are not connected. The male genitalia of 

 the two species are nearly identical, and it is just possible that when 

 the biology of both species is known they may prove to be only 

 extreme forms of the same species, but until these habits are known, 

 it is advisable to retain them as valid species. The two cotypes in 

 the LeConte and Horn collections were both collected by Belfrage in 

 Texas. Specimen No. 2 in the LeConte collection labeled " addendus 

 Cr. type 5079-2 " is abjectus, Horn, and not addendum. 



93. AGRILUS QUERCUS Schaeffer 



Figure 09 



Agrilus quercus Schaeffkb, Brooklyn Inst. Mus., Sci. Bull., vol. 1, no. 7. 

 1905, pp. 150-151.— Feost and Weiss, Canad. Ent, vol. 53, 1921, p. 72.— 

 Chamberlin, Cat. Buprestidae, 1926, p. 79. 



Male. — Form moderately elongate, rather strongly flattened above, 

 and feebly shining; head opaque, reddish brown in front, and becom- 

 ing darker brown on the occiput, pronotum and elytra dark brown, 

 with a cupreous or aeneous tinge, and the elytra ornamented with 

 more or less distinct pubescent spots or designs; beneath reddish 

 cupreous, and more shining than above. 



Head with the front rather narrow, feebly convex, slightly wider 

 at bottom than at top, the lateral margins feebly, broadly constricted 

 near the middle, and with a narrow, vague, longitudinal groove ex- 

 tending from occiput to middle of front; surface densely, finely 

 granulose, sparsely punctate, longitudinally rugose on occiput, and 

 rather sparsely clothed with long, recumbent, silvery white pubes- 

 cence; epistoma strongly transverse between the antennae, and 

 broadly but not deeply, arcuately emarginate in front; antennae 

 extending to middle of pronotum, serrate from the fifth joint, and the 

 outer joints about as wide as long; eyes large, oblong, and more 

 acutely rounded beneath than above. 



Pronotum one-fourth wider than long, slightly narrower at base 

 than apex, and widest at apical third ; sides feebly, arcuately rounded 

 from apical angles to middle, then more strongly narrowed to near 

 the posterior angles, where they are sinuate, and the angles rec- 

 tangular ; when viewed from the side the marginal carina is strongly 

 sinuate, the submarginal carina nearly straight, the two carinae 

 widely separated anteriorly, and narrowly separated posteriorly to 

 the base ; anterior margin strongly sinuate, the median lobe strongly, 

 broadly rounded ; base strongly emarginate at middle of each elytron, 

 the median lobe strongly, broadly rounded, and arcuately emarginate 



